써서

writing and, by writing, worrying about, paying a lot of attention to

→ 쓰다
verb Uncommon #7,360
writing and, by writing The connective form of 쓰다; it links writing to a following action or result.
KO: 이름을 써서 제출했어요.
EN: I wrote my name and submitted it.
worrying about, paying a lot of attention to Used in the expression 신경을 쓰다, meaning to worry about or pay attention to something.
KO: 너무 신경을 써서 잠을 못 잤어요.
EN: I worried about it so much that I couldn't sleep.
Conjugation of 쓰다

사과하는 편지를 써서 보내 줘.

Write an apology letter and send it.

손으로 써서 알아볼 수가 없어요

I can't make it out because it's handwritten.

— 엘 시크레토: 비밀의 눈동자 (2009)

쇼코의 샴푸를 멋대로 써서?

Are you using Shoko's shampoo without permission?

— 목소리의 형태 (2016)

편지 못 써서 미안해

Sorry I couldn't write you a letter.

— 빈폴 (2019)

금방 써서 가져올게요

I’ll write it up and bring it right over.

— 레옹 (1994)

아직 안 써서 그래요

It's because I haven't used it yet.

— 아메리카의 밤 (1973)

우린 머리를 써서 일해야 해

We need to use our brains to do our work.

— 공포의 보수 (1953)

오랫동안 편지를 못 써서 죄송해요.

I'm sorry I haven't written to you for so long.

감히 이런 글을 써서 줘?

How dare you write and hand me something like this?

— 천녀유혼 (1987)

신경 써서 입고 나오라고

Make sure you dress nicely before you come out.

— 무간도 (2002)